Mineral oil composition



Patented Mar. 1 5, 1 938 2,1

UNITED STATES PATENT FFECE MINERAL OIL COMPOSITION Thomas W. Bartram, Nitro, W. Va., assignor, by

mesne assignments, to Monsanto Chemical Company, St. Louis, Mo., a corporation of Delaware No Drawing. Application September 12, 1935,

- Serial No. 40,308

4 Claims. (Ci. 44-9) The present invention relates to a composition relatively unstable oil product, for example gasoof matter comprising oil products for use as liquid line, materially increases the stability thereof, fuels in internal combustion engines, as lubricomprise cyclohexyl amines. Among the members cating oils, as transformer oils, as a circulating of this group of compounds which are suitable 5 medium in oil heating systems, and the like. for use according to the present invention are One object of the present invention is to procyclohexyl amine, cyclohexylphenyl amine, cyclovide a new treated oil composition possessing hexyl a pha ap t yl am (z-methyl cyclodesirable stabilizing properties. hexyl) p a p yl am n y y Another object of the present invention is to hexyl) alphanaphthylamine,(2-ethylcyclohexyl) 1 provide a new mineral oil product possessing imalpha naphthyl amine, (l-ethyl cyclohexyl) alpha if) proved properties particularly for use as a fuel naphthyl amine, cyclohexyl ortho toluidine and for internal combustion engines. The treating analogues and eq ivalents thereof. These commeans and special compositions disclosed herein pounds may be prepared by any of the wellare likewise adaptable for use as a transformer known methods. Thus cyclohexyl alpha naphthyl 1 oil, as a lubricating means, as a heat circulating amine may readily be prepared by heating cyclomedium and analogous uses wherein it is dehexanol or cyclohexyl amine with alpha naphthyl sirable that an improved and satisfactorily stable amine. Also included within the scope of the mineral oil product be employed, present invention is the reaction product of cyclo- It is well known that combustible liquids dehexanone and aniline and more specifically the rived from mineral oils before the usual refining reaction product of substantially one molecular 23 processes, frequently and in some cases invariably, proportion of cyclohexanone and substantially contain a proportion of ingredients which give w m l r proportions of aniline, w h pro rise to resin formation. This is particularly the uct is believed to P088655 the u al forcase with various fractions of oils produced by Illllla 25 different refining and treating means from var- H C (H g x, 25

ions crude oils. Immediately and for a short 7 2 time after. distillation, such unrefined motor fuel, 1130 for example cracked gasoline, may be compara- N0 tively free from nonvolatile resinous matter, but H on storage r w n us d in internal com usti n In order to test the gum inhibiting properties 20 nes give rise to resinous material. of the preferred class of materials the following A f h r o jec f th pr sent inven ion i to procedure, which is essentially that described substantially prevent or greatly reduce the resin by n, i h and Blackformation in such liquids, thus rendering it 1105- wood in the Society of Automotive Engineers sible to store them for substantially long periods Journal, vol. 26, #1 (1930), pages 32 -and 33, was 35 of time without deterioration and to use them employed.

satisfactorily as fuels in internal combustion en- Into an Emerson coal calorimeter-bomb havgir es, thus avoiding or considerably reducing re-. ing a capacity of 500 c. c., a small glass open fi losses. vessel having a capacity of substantially 150 c'. c.

40 It has been recognized that if the above was placed, which contained 100 c. c. of an un- 40 tioned fuels could be treated in some manner treated unstable gasoline such as for example a which would prevent resin formation there would gasoline known as cracking coil distillate to be a great advantage in using such fuel which has which had been added a small proportion of one been refined as little as possible in view of the of the preferred class of materials which may no y of uti i in t wh of the unsatbe called gum inhibitors. The lidwas then 45 urated constituents and also because these conplaced tightly on the bomb. Substantially one stituents' possess valuable anti-knock properties. hundred pounds pressure of oxygen was then in- More particularly, the present invention relates troduced by means of a delivery tube, after which to the incorporation in a mineral oil or material said delivery tube was closed by means of a suitderived therefrom, of a suitable material which able valve. The bomb was then connected by 50 greatly inhibits the formation of resin, gum or like means of a deliverytube with a premure gauge deposits, after which it was heated preferably by immersing.

The class of materials which have been found it in a hot water bath maintained at 95 to 98 C. to possess the desirable qualities set forth in and maintained at said temperature so long as that a small proportion when incorporated in a there was no appreciable drop in pressure. A 55 drop in pressure indicates a reaction between the oxygen and the unstable portion of the gasoline. The period of time elapsing before this reaction takes place is indicative of the stability of the gasoline and is known as the induction period. For the special type of gasoline mentioned, that is the unstable gasoline known as cracking coil distillate, the induction period as hereinafter employed is the time in minutes from the time of the immersion of the bomb in the bath maintained at a temperature of -95-98 C. until there is a drop in pressure of 15-pounds per square inch.

As one specific embodiment of the present invention, but not tobe understood as .in any sense limitative of the scope thereof, 50 m. g. of

cyclohexyl alpha naphthyl amine were dissolved hol, benzol and other like solvents fully miscible with said unstable oil product, and the solution of the inhibitor thus prepared added thereto.

As'other specific embodiments of ,the present invention cyclohexyl amine, cyclohexyl phenyl amine and the reaction product of substantially one molecular proportion of cyclohexanone and substantially two molecular proportions of. anl+ line have been incorporated in an unstable cracked gasoline and tested in the manner hereinbefore set forth and found to produce a. gasoline of improved properties.

seen from the above data the preferred class of materials comprise an important class of stabilizers for oil products, such as for example gasoline. Other similar oil compositions designed for'particular uses may be prepared in the manner described by merely substituting the desired oil fraction or out and adding the necessary quantity of gumoinhibitor thereto. Other ratios of the preferred class of material than those hereinbefore set forth have been incorporated in an unstable oil product, for example gasoline. Further, other methods of testing than those set forth above may be employed. The invention is limited solely by the following claims.

What is claimed is:

1. A cracked hydrocarbon motor fuel ofthe type which tends to deteriorate on storage as evidenced by color and gum formation having incorporated therein a small proportion of 'a' cyclohexyl naphthyl amine.

2. Cracked gasoline having incorporated therein a small proportion of a cyclohexyl naphthyl amine.

3. A cracked hydrocarbon motor fuel of the type which tends to deteriorate on storage as evidenced by color and gum formation having incorporated therein a small proportion of cyclohexyl alpha naphthyl amine.

4. Cracked gasoline having incorporated therein a small proportion of cyclohexyl alpha naphthyl amine.

THOMAS W. BARTRAM. 

